Specify ember variant per environments
Bootstrap ember-rails
Remove haml_coffee_assets gem.
Ember.js doesn't favor template engine changes.
Remove comments
Add an admin css file and switched from css to sass.
Add helper for the html class hack from Paul Irish
Add modernizr-rails gem
Add modernizr in app and admin manifest
Application javascript manifest shouldn't include the admin one
Add html class hack helper in layouts.
Add Rack::Offline bootstrap